# Relationship history for MSHA mine 3609645

Current hierarchy: **James W  Barber → James W. Barber Trucking & Excavation, LLC → Hop Bottom Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Garrett Hannigan → Hop Bottom Quarry; 2008-07-16 to 2008-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Garrett  Hannigan → Hop Bottom Quarry; 2008-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garrett  Hannigan → Garrett Hannigan; 2008-07-16 to 2008-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Jeffrey C. Skinner → Hop Bottom Quarry; 2008-09-10 to 2009-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey C  Skinner → Hop Bottom Quarry; 2008-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey C  Skinner → Jeffrey C. Skinner; 2008-09-10 to 2009-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Jason Carroll → Hop Bottom Quarry; 2009-04-21 to 2020-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Jason J  Carroll → Hop Bottom Quarry; 2009-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason J  Carroll → Jason Carroll; 2009-04-21 to 2020-07-06; source msha-controller-operator-history
- **operator_operates_mine:** James W. Barber Trucking & Excavation, LLC → Hop Bottom Quarry; 2020-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James W  Barber → Hop Bottom Quarry; 2020-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James W  Barber → James W. Barber Trucking & Excavation, LLC; 2020-07-07 to current/open; source msha-controller-operator-history